Zulip released Zulip Server 12.0 of their open-source team chat platform, featuring end-to-end encryption for mobile push notifications, a major Docker upgrade, and configurable image previews. The release includes nearly 5,500 new commits merged since version 11.0 in August 2025. This marks the 11th consecutive year Zulip is participating in Google Summer of Code.

The project now has 1,680 code contributors, with 160 people submitting commits since the 11.0 release. Notably, 99 contributors have made 100+ commits each. Organizations can now create demo organizations in Zulip Cloud without providing email or any identifying information, with automatic deletion after 30 days.

The team recently navigated significant challenges with AI-generated contributions, filtering out hundreds of low-quality PRs during the fall-winter period. They've established a new AI use policy requiring contributors to fully understand, test, and explain their proposed changes. Interestingly, they're now using Claude Code internally to generate reviewable pull requests—engineers regularly produce work that's nearly ready for merging.

Looking at their mobile roadmap, the team plans to enhance iOS notifications and introduce a recent conversations view. Eight mobile releases since version 11.0 have already improved navigation, channel subscription management, and added support for new features like inline images and channel folders.